Margolis mentions that recruiting 5 people to get feedback from is often sufficient, especially when you’re doing usability testing. He does stress that it’s worth the effort recruiting these people selectively and carefully, as this will help generate better results and avoid wasting time. Creating a simple participant screener document or survey is a good way to recruit the ‘right’ users (see an example in Fig. 1 below).

The representation of the user interview in the form of an arc, I probably found the most helpful aspect that Margolis (see Fig. 2 above). This arc really helps in structuring an interview, identifying the appropriate sequence of activities during the interview.

Main learning point: User research doesn’t have to be complicated, super time consuming or overly expensive. A huge thanks to Michael Margolis for sharing such a wealth of very useful and practical user research insights!